Date: Sun, 3 Oct 2004 02:15:46 +0300 From: Giorgos Keramidas <keramida@freebsd.org> To: Michael Reifenberger <mike@reifenberger.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Protection from the dreaded "rm -fr /" Message-ID: <20041002231546.GD1381@gothmog.gr> In-Reply-To: <20041002204851.K24332@fw.reifenberger.com> References: <20041002081928.GA21439@gothmog.gr> <200410021123.59811.max@love2party.net> <20041002102430.Y5481@thor.farley.org> <20041002165155.GP35869@seekingfire.com> <20041002175517.GA2230@gothmog.gr> <20041002204851.K24332@fw.reifenberger.com>
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On 2004-10-02 21:16, Michael Reifenberger <mike@reifenberger.com> wrote: >> Exactly. Who would expect `rm -rf /` to actually succeed? It's not >> only dangerous, it doesn't work in a useful way ;-) >> >> If one is thinking about `rm -rf /`, `newfs` is probably the right >> answer. > > newfs only works if the root is not mounted because otherwise the > device is locked. No it doesn't. You're just protected by GEOM's locking of the partition table for mounted partitions. > (Hmm is GEOM too anti foot shooting? Yes. > But can't you reenable foot-shooting via sysctl?) Not via a sysctl, but there is an ioctl to do that now: DIOCSMBR. See revision 1.14 of src/usr.sbin/boot0cfg/boot0cfg.c for an example.
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